Science· 2015Q1
Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals
- 5,084citations
- Q1SCImago
- 2015year
Short summary
Organolead trihalide perovskite single crystals exhibit trap-state densities comparable to silicon (10^9-10^10 cm^-3) and carrier diffusion lengths over 10 micrometers, achieved via an antisolvent vapor-assisted crystallization method.
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Key points
- A novel antisolvent vapor-assisted crystallization method yields sizable (over 100 mm^3) crack-free MAPbX3 single crystals.
- MAPbX3 single crystals show trap-state densities of 10^9 to 10^10 cm^-3, comparable to photovoltaic-grade silicon.
- Charge carrier diffusion lengths in these single crystals exceed 10 micrometers.
- Density functional theory calculations support the experimental findings.
AI-generated from the title and abstract; the full text is not read.
Abstract
The fundamental properties and ultimate performance limits of organolead trihalide MAPbX3 (MA = CH3NH3(+); X = Br(-) or I(-)) perovskites remain obscured by extensive disorder in polycrystalline MAPbX3 films. We report an antisolvent vapor-assisted crystallization approach that enables us to create sizable crack-free MAPbX3 single crystals with volumes exceeding 100 cubic millimeters. These large single crystals enabled a detailed characterization of their optical and charge transport characteristics. We observed exceptionally low trap-state densities on the order of 10(9) to 10(10) per cubic centimeter in MAPbX3 single crystals (comparable to the best photovoltaic-quality silicon) and charge carrier diffusion lengths exceeding 10 micrometers. These results were validated with density functional theory calculations.
The authors' abstract, as published at the source. Science, 2015 · DOI ↗
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Field: Electrical and Electronic Engineering
Electrical and Electronic EngineeringEngineering